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18 October 1995 <br /> AGE-NC Project No 95-0173 <br /> Page 3 of 5 <br /> recommendations for further investigation, if necessary <br /> 3 2 EQUIPMENT DECONTAMINATION <br /> All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean <br /> water after washing with a solution of Alconox All hollow stem augers are steam-cleaned prior to <br /> advancement in each borehole <br /> 33 LABORATORY ANALYSIS <br /> Selected soil samples will be analyzed for the following constituents total petroleum hydrocarbons <br /> quantified as gasoline and diesel (TPH-g, TPH-d), benzene, toluene, ethyl benzene, and xylene <br /> (BTE&X), and total lead Laboratory reports of soil analyses, testing methods, laboratory quality <br /> assurance/quality control (QA/QC) reports, and soil sample chain of custody documents will be <br /> presented in a report with the findings and recommendations <br /> 4.0. PROCEDURES <br /> 41 COLLECTION OF SOIL SAMPLES <br /> For the collection of soil samples, the following procedures will be performed <br /> 1 Notify the San Joaquin County Environmental Public Health Services - Environmental Health <br /> Division (PHS/EHD) 48 hours prior to commencement of any work Boring locations will <br /> be marked at least 48 hours in advance for an Underground Service Alert (USA) <br /> check of underground utilities or pipes <br /> 2 Advance five soil borings, using a truck-mounted drill rig, and 8 25-inch diameter hollow <br /> stem augers to depths of approximately 30 feet bsg Three soil bonngs will be advanced to <br /> approximately 70 feet bsg if hydrocarbon impacted soil is encountered at or before depths of <br /> 30 feet Boring locations are depicted on Figure 2 <br /> 3 Decontaminate all sampling equipment in an alconox solution and rinse twice with water prior <br /> to each sampling run <br /> 4 Sample each boring, beginning at 10 teet bsg, utilizing a California split-spoon sampler and <br /> pre-cleaned 2-inch by 6-inch brass sleeves <br /> . 5 Preserve soil in the brass sleeve by covering both ends with aluminum foil or Teflon tape, <br /> capping, and sealing with tape <br />